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Test your basic knowledge |
Dairy Cattle And Reproduction
Start Test
Study First
Subjects
:
industries
,
dairy
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Milk is 15% ________ and 85% __________.
dry matter and water
sow ovulation
#1 cost in production
pelvis
2. Allows extension of penis without fibro-elastic penis
Culls bulls earlier (2 reasons)
sigmoid flexure
6-8 weeks
sow estrus cycle
3. 16-20 hours
humans: stress level vs sperm
cow estrus
Culls bulls earlier (2 reasons)
dartos muscle
4. 2 month growth cycle. stored in the epididymis of the bull
effects of estrogen
Sperm growth rate
seminiferous tubules
libido test (BSE)
5. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.
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6. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers
sertoli cells
epididymis: definition - 3 parts - 4 functions
Where livelihood is in agriculture
Bull's fibro-elastic penis
7. Urinary calculi.
ewe gestation
Where livelihood is in agriculture
burdizzo
kidney stones also called ________ ___________ can develop in the sigmoid flexure
8. 10-37 (21) days
spermatogenesis
mare estrus cycle
penis sizes vs delivering methods
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
9. Birthing process (termination of gestation)
Dairy calves are removed from cow at birth to...
Parturition
kidney stones also called ________ ___________ can develop in the sigmoid flexure
Lutinizing Hormone in males
10. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat
Avg. bull specs
Size of cow in relation to the amount of milk produced
leydid or interstitial cells
Holstein Cow
11. Why does estrus happen before ovulation?
ewe estrus
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
cow estrus cycle
Sperm growth rate
12. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)
Mares
Holstein Cow
Reasons for gestation length being affected
4 major reasons for culling dairy cows
13. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm
Follical Stimulating in males
testosterone
mare estrus cycle
Size of cow in relation to the amount of milk produced
14. (LH) causes female's egg to break (her period)
semen evaluation (BSE)
reason for seasonal breeding periods
monorchid
Lutinizing Hormone in females
15. Birthing process (termination of gestation)
Grading choice
Parturition
Dairy Cattle milking schedule
monestrous
16. Larger the cow - more milk is produced; smaller the cow - less milk is produced
Size of cow in relation to the amount of milk produced
Reasons for gestation length being affected
mare's estrous cycle
mare gestation
17. When are dairy cattle dehorned?
~1 month
growth lost from castration methods (knife & band)
mastitis
effects of BST
18. Implies the amount of estrogen production
hormones
femininity of a heifer
colostrum
seasonally polyestrous
19. What makes the milk flow through the mammary glands?
Blood
vulva
effects of estrogen
burdizzo
20. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)
feeding a high producing dairy cow
penis sizes vs delivering methods
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
Blood
21. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)
retractor muscles
retractor muscles
sertoli cells
accessory sex glands
22. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.
1. more cost effective - 2. powdered milk is in excess production
uterus
mare estrus cycle
Grading choice
23. Help to signal hormone levels which we need both in the brain right next to each other.
Dairy Cattle Gestation
libido test (BSE)
Reasons for gestation length being affected
hypothalamus and pituitary gland
24. 336 days
Grading choice
Culls bulls earlier (2 reasons)
mare gestation
Dairy Cattle Lactation (standard)
25. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market
Reasons for gestation length being affected
reasons for castration
Mares
estrus
26. 24 hours before end of estrus cycle
Jersey Cow
epididymis: definition - 3 parts - 4 functions
mare ovulation
dairy cattle pregnancy check
27. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %
why does the cow need fat deposits during pregnancy?
eminal vesicles
Parturition
Jersey Cow
28. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.
4 major reasons for culling dairy cows
retractor muscles
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
Sperm survival specs
29. 336 days
mare gestation
Parturition
feeding a high producing dairy cow
hormones
30. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract
eminal vesicles
Lutinizing Hormone in females
sow estrus
mare ovulation
31. 147 days
sigmoid flexure
dairy cattle pregnancy check
epididymis: definition - 3 parts - 4 functions
ewe gestation
32. 1-2 days
ewe estrus
scrotal circumference (BSE)
scrotum
testis (gonads)
33. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat
Holstein Cow
mare estrus
reason for seasonal breeding periods
castration
34. Provide nourishment for the developing sperm
hormones
sertoli cells
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
vulva
35. Failure to have both testis (gonads) descend
cow estrus
purpose of Breeding Soundness Exam (BSE) for males
cryptorchid
hypothalamus and pituitary gland
36. Actual heat cycle (period)
Holstein Cow
Follical Stimulating in females
estrus
Sperm survival specs
37. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat
butterfat
Dairy Cattle Lactation (standard)
humans: stress level vs sperm
functions of progestrone
38. Days which have decreasing daylight hours
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39. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)
Mares
Where livelihood is in agriculture
Avg. bull specs
feeding a high producing dairy cow
40. Microscopic - make sure not sterile - very few bulls are actually tested
semen evaluation (BSE)
visual evaluation (BSE)
sow estrus
testosterone
41. Milk is 15% ________ and 85% __________.
dry matter and water
functions of progestrone
testosterone
epididymis: definition - 3 parts - 4 functions
42. 19-23 (21) days
4 major reasons for culling dairy cows
testis (gonads)
mare gestation
sow estrus cycle
43. 45-60 days after breeding; re-breed as required
#1 cost in production
polyestrous
dairy cattle pregnancy check
butterfat
44. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.
effects of estrogen
things to check for in a breeding soundness exam (BSE)
mastitis
cow estrus cycle
45. ~305 days (altough often longer due to breeding difficulties)
6-8 weeks
Dairy Cattle Lactation (standard)
testis (gonads)
mare estrus cycle
46. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market
reasons for castration
penis and prepuce observation (BSE)
stag
Avg. bull specs
47. Knife-loose ~1wk of growth. band-loose ~2wks of growth.
sigmoid flexure
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
growth lost from castration methods (knife & band)
testis (gonads)
48. (FSH) causes egg to mature in females
retractor muscles
Jersey Cow
Follical Stimulating in females
cow gestation
49. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm
scrotal circumference (BSE)
Blood
Follical Stimulating in males
vulva
50. Days which have decreasing daylight hours
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